The cooling performance of SiC/water nano fluid during reflood heat transfer in a long vertical tube

Many researchers have been trying to create new kinds of heat transfer fluids in order to enhance the heat transfer performance of the base fluids. Nano fluids as new kinds of heat transfer fluids are a new class of nano technology based heat transfer fluids engineered by dispersing nanoparticles into conventional heat transfer fluids such as water, ethylene glycol, and engine oil. Most of the studies on a heat transfer of nano fluids have been concentrated on the nucleate boiling region and the C HF phenomenon. A quenching phenomenon is important for analysis of the reflood phase associated with the emergency cooling in water cooled nuclear reactor core under a loss of coolant accident and the reflood is happened when water refills the reactor vessel and quenches the fuel rod at the time of the severe accident in nuclear power plant. The use of other fluids instead of water for the quenching experiment in the sphere and rod let specimens has been investigated by many researchers. In this work, we have observed a quenching phenomenon of a hot vertical tube during a reflood using SiC/water nano fluid as a coolant, instead of water. Experiments were conducted to investigate the effect of SiC/water nano fluid on reflood heat transfer in a long vertical tube. The cause selecting SiC nanoparticles is that applying SiC as a cladding material for a light water nuclear reactor is considering because the resistance of SiC to the high-temperature and high radiation environment is good. 0.01 volume fraction (%) SiC/water nano fluid was prepared by two step method